Not receiving calls/texts.

Not receiving calls/texts.

I can't send or receive calls/texts. When I send a text it's infinitely sending, and when calling it just sits there, no ringing. I almost missed a job interview because their missed call never showed up, nor rang.

It's fixed for an hour or so if I restart my phone, but then the problem persists.

I have no upgrade available so this is quite troubling and is, honestly, making me quite mad.